Vane type rotary fluid displacement device



q Filed Dec. 6, 1967 Jan. '6, 1910 E. L. PA 487,787

VANE I'YPE ROTARY FLUID DISPLACEMENT DEVICE 8 Sheets-Sheet 1 7 INVENTOR EDWARD L. PAR

Jan. 6, 1970 E. L. FARR VANE TYPE ROTARY FLUID DISPLACEMENT DEVICE Filed Dec. 6, 1967 8 Sheets-Shem. 2

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A TTORA/E Y Jana mm E. L. FARR Mmm? VANE TYPE ROTARY FLUID DISPLACEMENT DEVICE Filed Dec. 6, 1967 8 Sheets-Sheet 8 INVENTOR. EDWARD L. PAR/i United States Patent 3,487,787 VANE TYPE ROTARY FLUID DISPLACEMENT DEVICE Edward L. Parr, El Cajon, 'Calif., assignor to Wendell L. Thompson, Burbank, Calif.

Filed Dec. 6, 1967, Ser. No. 688,384

Int. Cl. F04c 1/00, 15/04; F01c 1/00 US. Cl. 103117 25 Claims ABSTRACT OF THE DISCLOSURE A vane type pump or motor, the casing of which includes parallel side walls joined by a circular wall, each side wall having an inlet and an outlet. A shaft is journaled in the side walls and rotates the radially extending vanes, which extend through slots in a disk to rotate the disk, the disk being disposed diagonally or movable to a position diagonally with respect to the axis of the shaft and divides the casing into two sub-chambers, each of which forms a pumping chamber or a motor chamber or both.

BACKGROUND OF THE INVENTION Field of invention The present invention is directed to a rotary fluid displacement device which can be either a vane type pump or a vane type motor.

Description of the prior art The Cuny Patent No. 2,101,051 employs two rotating disks 3 and 4, one of which has a stationary vane 4A. Each disk is driven by a separate shaft 7 and 8 which are hinged to one another.

The Reynolds Patent No. 2,858,770 discloses a rotary pump having dual chambers formed by a rotar 48 having inclined faces 58 and 60. Each chamber has an inlet opening and an outlet opening. As the central shaft rotates, the inclined faces of the rotor function alternately to compress and exhaust fluid in the working chambers.

Summary of the invention The casing of the device of the present invention forms a chamber which is divided into two fluid receiving and expelling sub'chambers by a diagonally disposed disk whereby each chamber functions as a fluid displacement chamber. Either the casing or the unit comprising the shaft, disk and vanes is rotated relative to one another. The embodiments illustrated are of the type in which the shaft, the vanes and the disk are rotated.

In one embodiment, the capacity of the device is rendered variable by shifting the degree of diagonal relationship between the disk and the confronting wall of the casing.

The center of the disk is provided with a centrally disposed portion having two spherical surfaces. These surfaces have a common center and that portion is centrally bored to receive the shaft. The shaft also includes grooves disposed on one side of the spherical surfaces. A collar, which is fixed to the shaft and disposed on the opposite side of the spherical surface, is also provided with grooves. These grooves in the shaft and collar extend longitudinally of the shaft and receive the inner ends of the vanes and the vanes extend through radially extending slots in the disk and are in reciprocating relationship with the slots.

Other features and the advantages of the present invention will be apparent from the following description, reference being had to the accompanying drawings wherein preferred embodmients of the invention are illustrated.

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Brief description of the drawings FIG. 1 is a side view of one embodiment of the present invention;

FIG. 2 is a view showing the casing for the pump in cross section, the section being taken along line 22 of FIG. 1, but on a larger scale, and also showing the shaft, the vanes and the disk in elevation;

FIG. 3 is a perspective view of the disk;

FIG. 4 is a perspective view of the shaft, the vanes and the disk;

FIG. 5 is a sectional view taken along line 5-5 of FIG. 2;

FIG. 6 is a fragmentary view of the disk looking in the direction of arrow 6 in FIG. 3, but on a large scale, and showing a vane in the slot;

FIG. 7 is a fragmentary sectional view taken along line 7-7 of FIG. 6;

FIG. 8 is a fragmentary sectional view taken along line 88 of FIG. 6;

FIG. 9 is a perspective view of a vane;

FIG. 10 is a sectional view taken along line 10-10 of FIG. 1, but on a larger scale;

FIG. 11 is a top plan view of another embodiment of the invention;

FIG. 12 is a side view of the embodiment shown in FIG. 11 looking in the direction of arrows 12 of FIG. 11;

FIG. 13 is a sectional view taken along line 1313 of FIG. 12;

FIG. 14 is a sectional view taken along line 14-14 of FIG. 13, but showing the disk in elevation;

FIG. 15 is a fragmentary sectional view taken along line 1515 of FIG. 13;

FIG. 16 is a fragmentary sectional view looking in the direction of arrow 16 in FIG. 13;

FIG. 17 is a fragmentary view showing another form of bearings for the disk;

FIG. 18 is a fragmentary view of the supporting mechanism for the device, the view looking in the direction of arrow 18 in FIG. 12;

FIG. 19 is a view similar to FIG. 13, but showing the position of the disk when the casing is in one of its two maximum displacement positions; and

FIG. 20 is a fragmentary view of the circular casing and the rod for shifting the casing.

Description of the preferred embodiments Referring first to the embodiment shown in FIGS. 1 through 10, the fluid displacement device 20 includes a casing 22 formed by two sections 24 and 26 of like construction, each having a peripheral rim 28, which rims are secured to one another by screws 30. The sections 24 and 26 are provided with side walls 32 and 34, respectively. These walls are parallel and are provided with aligned hubs 33. The confronting surfaces 36 and 38 of the rims 28 of the casing sections 24 and 26, respectively, are disposed diagonally with respect to the axis of the aligned hubs 33. The sections together provide a wall 40 having a circular inner surface 42, which is preferably in the form of a sector of a sphere, the axis of which is common to the axis of hubs 33 and the center point is equal distance from the side walls 32 and 34. The side wall 32 of section 24 is provided with an inlet opening 44 and an an outlet opening 46. The casing section 26 is provided with like inlet opening and a like outlet opening. The confronting surfaces of the rims 28 of the casing sections are recessed as at 47 and 48 to provide a circular groove 50.

The hubs 33 support bearings herein shown as ball bearings 52 and 54. A shaft 58 is journaled in these bearings. As is seen more clearly in FIG. 5, the left portion 60 of the shaft is larger in diameter than the right portion 62. An intermediate portion 64 is of still larger diameter than the portion 60 and it is provided with a series of radially extending grooves 66 which receive vanes 68 (see FIG. 15). The outer marginal edges of the vanes complement the spherical surface 42 of the wall 40.

The outer portion 70 of a disk 72 extends into the groove 50 formed by the rims of the casing sections 24 and 26. This disk is provided with a plurality of radially extending slots 74 which receive the vanes 68. The disk 72 includes an integral centrally disposed portion 76, having like surfaces, each in the form of a sector of a sphere and disposed on the opposite side of the disk; these sectors are shown at 78 and 80. The center of the spherical sectors is common and is common with the center of the inner cylindrical surface 42 of the casing 22 and is spaced equal distance between the side walls 32 and 34 of the casing sections 24 and 26, respectively.

Referring to FIGS. 2, 4, and 10, it will be seen that the shaft 58 carries a collar 84 on the right side of the central portion 76 of the disk 72. It is fixed to the shaft by a pin 86. It is provided with grooves 88 which are aligned with the grooves 66 in the shaft portion 64 and receive the vanes 68. As seen more clearly in FIG. 9, the inner portions of the vanes have arcuate surfaces 89 which complement the sector surfaces of the central portion 76 of the disk.

The central portion 76 of the disk 72 is bored as at 90 for receiving the portion 91 of the shaft 58, which portion is intermediate the portions 64 and 62. This bore is tapered outwardly in opposite directions as shown at 92 from a line equal distance from opposite sides of the disk and intersecting the center of the spherical surfaces 78 and 80. The portion 76 of the disk is provided with a groove 94 at the apex of the tapers and receives a sealing ring 96.

The walls (see FIGS. 6 and 8) forming the slots 74 in the disk 72 are tapered in opposite directions from a longitudinally extending groove 98 and this groove receives a hairpin shaped rubber seal 100.

When the casing 22 is rotated relative to the unit, including the shaft 58, the vanes 68 and the disk 72, or when that unit is rotated relative to the casing 22, and when the device functions as a pump, fluid will be drawn into the inlets 44 and expelled through the outlets 46. If the fluid being displaced is a liquid, then in that event the side walls 32 and 34 are provided with elongated inlet ports and outlet ports connected with the inlets and outlets. One of these inlet ports (see FIG. is shown at 102 and one of the outlet ports is shown at 104. The inlets 44 and the outlets 46 are connected with fittings 106. These fittings may be employed for supporting the casing 22.

The recesses 47 and 48, which form the inwardly opening circular groove 50, receive a circular Teflon bearing 108, which is U-shaped in cross section and forms a seal for the rim 70 of the disk 72. The periphery of the disk is provided with a circular groove 110 and this receives an O-ring 112.

The rim 28 of the casing section 24 is provided with a circular groove 116 which receives an O-ring seal 11 8.

Upon rotation of the shaft, and inasmuch as the side edges of the vanes engage the side walls 32 and 34 of the casing sections 24 and 26, reciprocation is effected between the disk and the vanes. The hairpin shaped flexible and resilient rubber seals 100 prevent the escape of fluid from one side of the disk to the other. Rubber O-rings 96 prevent the escape of fluid from one side of the disk to the other along the shaft portion 91. While reciprocation is effected, the vanes will oscillate and, therefore, the taper is necessary in the walls forming the slots in the disk. Likewise the tapers 92 are necessary in the bore 90 of the disk since each portion of the disk upon rotation moves from one extreme portion of the wall 32 to the opposite extreme portion of the wall 34 of the casing sections 24 and 26, respectively.

Referring now to the embodiment shown in FIGS. 11 to 19, in this embodiment the casing 122 of the device is formed by two stationary walls 132 and 134. These walls are spaced from, and are arranged parallelly with one another. They are supported by brackets 125 and 127 which, in turn, are supported by stationary supports, parts thereof being shown at 129. The casing 122, in addition to the walls 132 and 134, includes a cylindrical wall 140, the inner surface 142 of which is in the form of the sector of a sphere. This wall is formed of two like sections 131 and 133, each having a rim 128, which rims are fastened to one another by screws 130. The rims are recessed as at 146 and 148 to form a groove 150 which receives the Teflon ring 114. As in the first mentioned embodiment, the rim 70 of the disk 72 extends within the U-shaped bearing ring 114. The periphery of the disk is provided with a groove 110 which receives the O-ring 112.

The main difference between these two embodiments lies in that the spherical surface 142 of the cylindrical wall 140 has its center common with the center of the disk 72 and is shiftable about that center and longitudinally of the axis of the shaft 58. Also, the marginal edges of the vanes 68 complement the spherical surface 142 of the casing wall 140. Any suitable means may be employed for shifting the casing wall 140 relative to the stationary walls 132 and 134. The brackets 125 and 127 carry pins 149 which are received in sockets 151 in the rim 128 of easing wall 140. The axis of these pins and sockets intersect the center of the spherical surfaces 78 and 80 which line lies at right angles with respect to the axis of shaft 58. As is herein shown, the casing section 131 is provided with bosses 135 which are pivotally attached to an actuating rod 137 by a pin 139.

The peripheries of the circular wall sections 132 and 134 are provided with grooves 141 and receive O-ring seals 143 which seal with the inner surface 142 of the wall 140. The central portions of these wall sections 132 and 134 are provided with grooves 145 which receive O-ring seals 147 which seal with the shaft 58.

In both embodiments, the vanes 68 have an arcuate surface 89 which compliments the spherical surfaces of the portion 76 of the disk whereby seals are provided between the vanes 68 and the spherical surfaces 78 and 80.

Referring specifically to FIG. 17, the Teflon ring 114 is replaced by a series of balls 214 which function as the bearings for the rim 70 of the disk 72.

From the foregoing, it is apparent that there has been provided a fluid displacement device which has a number of advantages over the other displacement devices. Both embodiments are simple in construction, inexpensive and can be readily assembled. Each functions as two pumps which can be joined in parallel or can be joined in series circuit relation. The device also can function as two motors in parallel or in series circuit relation. Also, one side of the disk can function as a pump and the other side as a motor for driving the pump. Another advantage lies in that as shown in FIGS. 10 to 19, the pump or motor can be of the variable capacity type.

I claim:

1. A rotary fluid displacement device of the vane type, comprising in combination:

(A) casing means including:

(1) wall means having a circular interior surface,

said wall means including two confronting sections joined with one another and forming a circular groove at the joint,

(2) wall means including spaced and parallelly disposed walls forming a chamber with the first mentioned wall means, each of said spaced walls having an inlet and an outlet for the flow of fluid therethrough;

(B) means including:

(1) a shaft journaled in at least one of said spaced walls,

(2) a disk connected with the shaft and disposed diagonally relative to the axis of the shaft for dividing the said chamber into two subchambers, said disk having slots therein extending substantially radially from the axis of the shaft and from a point which is centrally disposed of the spaced walls, said disk ertending into the groove.

(3) vanes connected with the shaft and slidably disposed in the slots, the outer marginal ends of the vanes being closely embraced by the confronting sides of the spaced walls and by the circular surface of the first mentioned wall means;

(C) means for supporting at least one of the wall means of means (A) and the means (B) for rotation relative to one another;

(D) means providing a seal between the disk and said wall section in the first mentioned wall means.

2. A rotary fluid displacement device of the vane type,

comprising in combination:

(A) casing means including:

(1) wall means having a circular interior surface,

(2) wall means including spaced and parallelly disposed walls forming a chamberwith the first mentioned wall means, each of said spaced walls having an inlet and an outlet for the flow of fluid therethrough;

(B) means including:

(1) a shaft journaled in at least one of said spaced walls,

(2) a disk connected with the shaft and disposed diagonally relative to the axis of the shaft for dividing the said chamber into two subchambers, said disk having slots therein extending substantially radially from the axis of the shaft and from a point which is centrally disposed of the spaced walls, said disk including:

(a) an integral, centrally disposed portion hav- (i) like spherical surfaces having a common center with said point;

(ii) a bore, said bore receiving the shaft and being tapered outwardly in opposite directions from a line equal distance from opposite sides of the disk and intersecting the said center of the spherical surfaces;

(3) vanes connected with the shaft and slidably disposed in the slots, the outer marginal ends of the vanes being closely embraced by the confronting sides of the spaced walls and by the circular surface of the first mentioned wall means;

(C) and means for supporting at least one of the wall means of means (A) and the means (B) for rotation relative to one another.

3. A device as defined in claim 2, characterized in that the shaft and disk are in sealing relationship at the apex of the tapers in the bore of the disk.

4. A device as defined in claim 2, include:

(D) a sealing ring interposed between the disk and the shaft at the apex of the tapers in the bore of the disk.

5. A device as defined in claim 2, characterized in that the means (C) supports the casing means (A)(2).

6. A device as defined in claim 2, characterized in that the means (C) supports the casing means (A)(l) and (A) (2).

7. A device as defined in claim 2, characterized in that the circular surface of the wall means (A)(l) is in the form of a sector of a sphere, said sector having a common center with said point defined in (B)(2); and further characterized to include:

(D) means for shifting one of the casing wall means relative to the other about anaxis intersecting the characterized to said center of the hpherical surfaces and lying at right angles with respect to the axis of the shaft.

-8. A device as defined in claim 2, characterized in that the shaft and vanes include intedfitting sections.

9. A device as defined in claim 2, characterized in that the disk is provided with:

(B) (2) (a) longitudinally extending grooves in the surfaces forming the slots;

and further characterized to include:

(D) flexible and resilient seals within the grooves, said seals being in sealing relationship with the vanes.

10. A device as defined in claim 2, characterized in that the elongated portions of the walls of the disk, which form the slots, are tapered outwardly in opposite directions from the centers thereof.

11. A device as defined in claim 7, characterized in that the means (C) pivotally supports the shifted casing wall means about an axis intersecting the point defined in (B)(2) and lying at right angles relative to the axis of the shaft.

12. A device as defined in claim 7, characterized in that the means (C) supports the casing means (A)(l).

13. A device as defined in claim 2, characterized in that the circular surface of the wall means (A) (1) is in the form of a sector of a sphere, said sector having a common center with said point defined in (B)(2);

and further characterized to include:

(D) means for shifting one of the casing wall means relative to one another about an axis intersecting the said point and lying at right angles with respect to the axis of the shaft.

14. A device as defined in claim 11, characterized in that the means (C) pivotally supports the wall means (A)( 15. A device as defined in claim 13, characterized in that the shaft and vanes include interfitting sections and that the inner ends of the vanes are provided with surfaces which complement the peripheral surface of the spherical surfaces (B) (2) (a) (i).

16. A rotary fluid displacement device of the vane type,

comprising in combination:

(A) a casing including:

(1)spaced parallel walls, each having an inlet and outlet for the flow of fluid therethrough,

(2) a wall having a circular interior surface and having the ends thereof integral with the spaced walls and forming a chamber therewith, said surface having walls forming an endless groove, said groove intersecting the axis of the said interior surface at a point midway of the spaced walls;

(B) a drive shaft journaled in at least one of the spaced I walls, said shaft having a straight axis throughout the length thereof, the axis of the shaft and the said circular surface being common;

(C) vanes directly driven by the shaft, said vanes extending substantially radially from the shaft to the said circular surface, the side edges of the vanes being closely embraced by the confronting sides of the spaced walls;

(D) a circular disk encircling and in sealing relationship with the shaft, the axis of the disk intersecting said point, the outer end of the disk extending into the groove in said circular interior surface and guided by the walls forming the groove, said disk having slots therein extending substantially radially from the axis of the shaft, said vanes being disposed in the slots for imparting rotary movement to the disk, said disk being slidable relative to the vanes.

17. A device as defined in claim 16, characterized in that the interior circular surface of the wall (A) (2) is in the form of a sector of a sphere, the sector having a common center with said point;

and further characterized to include:

(D) means for shifting the casing about an axis intersecting said point and lying at right angles relative to the axis of the shaft.

18. A device as defined in claim 16, characterized in that the shaft and vanes include interfitting sections.

19. A device as defined in claim 16, characterized in that the disks are provided With longitudinally extending grooves in the surfaces forming the slots,

and further characterized to include:

(D) flexible and resilient seals within the grooves in the slots, said seals being in sealing relationship with the vanes.

20. A device as defined in claim 16, characterized in that the elongated portions of the Walls of the disk, which form the slots, are tapered outwardly in opposite directions from the centers thereof.

21. A device as defined in claim 16 characterized to include:

(D) means in the groove providing a seal between the disk and the said interior surface of wall (A) (2).

22. A device as defined in claim 16, characterized in that the disk includes spherical surfaces in the central portion thereof, said spherical surfaces having a common center with said point and that the inner ends of the vanes are curved to complement the spherical surfaces.

23. A device as defined in claim 16, characterized in that the shaft is provided with longitudinally extending grooves and that the vanes extend into the last mentioned grooves to provide driving connection between the shaft and vanes.

24. A device as defined in claim 22, characterized in that the shaft is provided with longitudinally extending grooves and that the vanes extend into the last mentioned grooves to provide driving connection between the shaft and vanes.

25. A device as defined in claim 24, characterized in that the grooves in the shaft are disposed on one side of the spherical surfaces of the disk,

and further characterized to include:

(D) a collar fixed to the shaft on the opposite side of the spherical surfaces on the disk, said collar having grooves aligned with the grooves in the shaft and receive the inner ends of the vanes.

References Cited UNITED STATES PATENTS 2,691,349 10/1954 Cuny 103-127 2,908,224 10/ 1959 Houser 103-120 3,101,059 8/1963 Easter 103--1l7 FOREIGN PATENTS 1,295,246 4/1962 France. 333,256 12/1935 Italy.

DONLEY J. STOCKING, Primary Examiner W. J. GOODLIN, Assistant Examiner U.S. Cl. X.R. l03120, 127 

